How can capture MDI Tab LBUTTONDBCLK

I capture left button double click in TabMouseMsg() to close currenct view

as samples do on RBUTTONDOWN to create a popup menu on MDITab

but it doesnt work!

I use XTP 8.70

I check the code and find LBUTTONDBCLK is the same position as RBUTTONDOWN, but why can't i catch LBUTTONDBCLK as sample does in MainFrm.cpp

LRESULT CMainFrame::OnTabbarMouseMsg(WPARAM wParam,LPARAM lParam)
{

if (wParam == WM_LBUTTONDBCLK)

{
TRACE("captured");// Never go to this line

return TRUE;
}

Even in your mditab sample, i just add a branch do deal WM_LBUTTONDBCLK, it doesn't work too!
That means WM_LBUTTONDBCLK is lost!

I try another message WM_LBUTTONDOWN, it can be captured in ON_MESSAGE(WM_XTP_PRETRANSLATEMOUSEMSG, OnTabbarMouseMsg)

Why this happens?

Hmm. I think you have EnableGroups option enabled

do you have

VERIFY(m_MTIClientWnd.Attach(this));

or

VERIFY(m_MTIClientWnd.Attach(this, TRUE));

If groups enabled, MDIClient has no CS_DBLCLICK style.

to fix it for groups add:

SetClassLong(m_MTIClientWnd.GetSafeHwnd(), GCL_STYLE, GetClassLong(m_MTIClientWnd.GetSafeHwnd(), GCL_STYLE) | CS_DBLCLKS);